Display screen or portion thereof with a graphical user interface



A portion of the disclosure of this patent document contains material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent files or records, but otherwise reserves all copyright rights whatsoever. The following notice applies to the software and data as described below and in the drawings that form a part of this document: Copyright 2012 Omicia, Inc. All Rights Reserved.

The sole FIGURE is a front view of a display screen or portion thereof with a graphical user interface.

The broken line showing of the display screen at the outer perimeter and portions of the graphical user interface within the outer perimeter form no part of the claimed design. 

CLAIM The ornamental design for display screen or a portion thereof with a graphical user interface, as shown and described. 